Question

A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
A.40 sec
B.42 sec
C. 45 sec
D.48 sec

Answer 1

45×5/18=12.5m/s
360m+140m=500m
if it covers 12.5m in 1 second let the time it will take to cross the bridge be x
x=500/12.5
x=40 second